Product Description

Product Parameters



Pipe Lenght

Overall Lenght




Pipe Lenght

Overall Lenght


1-3/4″ 4″ 4″ 1-3/4″ 4″ 8″ Yes
1-3/4″ 6″ 6″ 1-3/4″ 6″ 10″ Yes
1-3/4″ 8″ 8″ 1-3/4″ 8″ 12″ Yes
1-3/4″ 10″ 10″ 1-3/4″ 10″ 14″ Yes
1-3/4″ 12″ 12″ 1-3/4″ 12″ 16″ Yes
2″ 4″ 4″ 2″ 4″ 8″ Yes
2″ 6″ 6″ 2″ 6″ 10″ Yes
2″ 8″ 8″ 2″ 8″ 12″ Yes
2″ 10″ 10″ 2″ 10″ 14″ Yes
2″ 12″ 12″ 2″ 12″ 16″ Yes
2-1/4″ 4″ 4″ 2-1/4″ 4″ 8″ Yes
2-1/4″ 6″ 6″ 2-1/4″ 6″ 10″ Yes
2-1/4″ 8″ 8″ 2-1/4″ 8″ 12″ Yes
2-1/4″ 10″ 10″ 2-1/4″ 10″ 14″ Yes
2-1/4″ 12″ 12″ 2-1/4″ 12″ 16″ Yes
2-1/2″ 4″ 4″ 2-1/2″ 4″ 8″ Yes
2-1/2″ 6″ 6″ 2-1/2″ 6″ 10″ Yes
2-1/2″ 8″ 8″ 2-1/2″ 8″ 12″ Yes
2-1/2″ 10″ 10″ 2-1/2″ 10″ 14″ Yes
2-1/2″ 12″ 12″ 2-1/2″ 12″ 16″ Yes
3″ 4″ 4″ 3″ 4″ 8″ Yes
3″ 6″ 6″ 3″ 6″ 10″ Yes
3″ 8″ 8″ 3″ 8″ 12″ Yes
3″ 10″ 10″ 3″ 10″ 14″ Yes
3″ 12″ 12″ 3″ 12″ 16″ Yes

Exhaust Flexible Bellows Types:

A. Bellows + Outer Braid

B. Bellows + Interlock + Outer Braid

C. Bellows + Inner Braid + Outer Braid

D. Bellows + Outer Mesh

E. Type A/B/C + Nipples

F. Type D + Nipples



Detailed Photos

Bellows can be used in the exhaust system of large vehicles such as trucks, buses, buses, etc., for the high temperature portion of the engine exhaust manifold.
The Exhaust Bellows is installed in the exhaust pipe between the engine exhaust manifold and the muffler, so that the entire exhaust system is flexibly coupled, thereby reducing vibration and noise, facilitating installation and extending the life of the exhaust muffler system.




Packaging & Shipping

flexible coupling

Can flexible couplings accommodate variable operating conditions and loads?

Yes, flexible couplings are designed to accommodate variable operating conditions and loads in mechanical systems. They offer several features that allow them to adapt to changing conditions and handle different loads effectively. Below are the reasons why flexible couplings are well-suited for such applications:

Misalignment Compensation: Flexible couplings can handle misalignment between shafts, including angular, parallel, and axial misalignment. This capability allows them to accommodate slight shifts in shaft positions that may occur due to thermal expansion, vibration, or other factors, ensuring smooth operation even in changing conditions.

Shock and Vibration Absorption: Flexible couplings can dampen shocks and vibrations that result from sudden changes in load or operating conditions. The flexible element in the coupling acts as a buffer, absorbing and reducing the impact of sudden loads or transient forces, protecting connected equipment and increasing system reliability.

Variable Load Capacity: Flexible couplings come in various designs and materials, each with its load capacity range. Manufacturers provide different coupling models with varying load capacities to accommodate different applications. Properly selecting the right coupling for the specific load conditions ensures reliable power transmission even under varying loads.

Compensation for Thermal Expansion: Temperature changes can cause thermal expansion in mechanical systems, leading to shaft misalignment. Flexible couplings can handle the resulting misalignment, compensating for thermal expansion and ensuring continuous and smooth power transmission.

Torsional Stiffness: Flexible couplings are designed with a balance between flexibility and torsional stiffness. This property allows them to adapt to variable loads while still providing the necessary rigidity for efficient power transmission.

Durable Materials and Designs: Manufacturers produce flexible couplings from durable materials like stainless steel, aluminum, or engineered elastomers. These materials ensure that the couplings can withstand varying operating conditions, including temperature fluctuations, harsh environments, and high loads.

Dynamic Behavior: Flexible couplings have a dynamic behavior that enables them to operate smoothly and efficiently under changing loads and speeds. They can handle variations in rotational speed and torque while maintaining consistent performance.

Application Flexibility: Flexible couplings find applications in a wide range of industries, from automotive and aerospace to industrial and marine. Their versatility allows them to accommodate variable operating conditions and loads in different systems.

Summary: Flexible couplings are well-suited for applications with variable operating conditions and loads. Their ability to compensate for misalignment, absorb shocks and vibrations, and handle thermal expansion make them reliable components in mechanical systems. The availability of various coupling designs and materials allows for the selection of the appropriate coupling based on the specific application requirements, ensuring optimal performance and longevity in variable conditions.

flexible coupling

How does a flexible coupling handle misalignment in large rotating equipment?

Flexible couplings are designed to accommodate various types of misalignment in large rotating equipment, ensuring smooth and efficient power transmission while minimizing stress on connected components. Here’s how flexible couplings handle different types of misalignment:

  • Angular Misalignment: Angular misalignment occurs when the axes of the two connected shafts are not collinear and form an angle. Flexible couplings can handle angular misalignment by allowing the coupling elements to flex and move slightly, thus accommodating the angle between the shafts. The flexible elements, often made of elastomeric materials or metallic membranes, can bend and twist to compensate for angular misalignment, ensuring that the coupling remains engaged and transfers torque effectively.
  • Parallel Misalignment: Parallel misalignment, also known as offset misalignment, happens when the two shafts are not perfectly aligned along their axes, resulting in a lateral shift. Flexible couplings can handle parallel misalignment through their ability to move radially, allowing the flexible elements to adjust and take up the offset. This capability prevents excessive side loads on the shafts and bearings, reducing wear and increasing the lifespan of the equipment.
  • Axial Misalignment: Axial misalignment occurs when there is a linear displacement of one shaft relative to the other, either toward or away from the other shaft. Some flexible couplings, such as certain types of flexible disc couplings, can accommodate a limited amount of axial misalignment. However, for large axial movement, other types of couplings or special designs may be required.

The flexibility of the coupling elements allows them to act as a buffer between the shafts, dampening shocks, vibrations, and torsional forces caused by misalignment or other dynamic loads. This helps protect the connected equipment from damage and enhances the overall performance and reliability of the rotating system.

In large rotating equipment, where misalignment is more common due to thermal expansion, foundation settling, or other factors, flexible couplings play a critical role in maintaining smooth operation and reducing stress on the machinery. However, it is essential to choose the appropriate type of flexible coupling based on the specific requirements of the application and to regularly inspect and maintain the coupling to ensure optimal performance and longevity.

flexible coupling

How does a flexible coupling affect the noise and vibration levels in a mechanical system?

A flexible coupling plays a crucial role in controlling noise and vibration levels in a mechanical system. It can significantly impact the overall smoothness and quietness of the system’s operation, contributing to enhanced performance and reduced wear on connected components.

Noise Reduction:

Flexible couplings help reduce noise in a mechanical system through their inherent ability to dampen vibrations. When the shafts of rotating machinery are not perfectly aligned, it can lead to vibrations that are transmitted throughout the system, resulting in noise generation. The elastomeric or flexible element of the coupling acts as a vibration dampener, absorbing and dissipating these vibrations. As a result, the noise levels in the system are reduced, creating a quieter operating environment.

Vibration Damping:

Vibrations in a mechanical system can lead to increased wear and tear on critical components, such as bearings, seals, and gears. Excessive vibrations can also cause resonance and damage to the system over time. Flexible couplings can effectively dampen vibrations by acting as a buffer between the driving and driven shafts. The flexible element absorbs the shock and vibrations, preventing them from propagating to other parts of the system. This vibration damping capability not only reduces noise but also protects the system from potential mechanical failures, extending the lifespan of the equipment.

Alignment Compensation:

Misalignment between shafts is a common cause of vibration and noise in rotating machinery. Flexible couplings excel at compensating for both angular and parallel misalignment. By accommodating misalignment, the coupling reduces the forces acting on the shafts and minimizes the generation of vibrations and noise. Proper alignment through the use of a flexible coupling ensures that the system operates smoothly and quietly.

Effect on Equipment Reliability:

Reducing noise and vibration levels has a positive impact on the reliability of connected equipment. Lower vibrations mean less stress on bearings and other rotating components, leading to extended component life and reduced maintenance requirements. A quieter operating environment can also be essential for certain applications, such as in laboratories or precision manufacturing processes, where excessive noise can interfere with delicate tasks or measurements.


Flexible couplings find application in a wide range of industries, such as manufacturing, power generation, material handling, automotive, aerospace, and robotics. They are commonly used in pumps, compressors, fans, conveyors, and other rotating machinery where noise and vibration control are critical for smooth and reliable operation.


A flexible coupling’s ability to reduce noise and dampen vibrations makes it an essential component in mechanical systems. By compensating for misalignment and providing vibration dampening properties, the flexible coupling enhances the overall system performance, reduces noise levels, and protects connected equipment from excessive wear and mechanical failures. Choosing the right type of flexible coupling based on the specific application requirements can have a significant impact on noise reduction and vibration control in the mechanical system.

China high quality Stainless Steel Exhaust Flexible Coupling for Auto Engine Exhaust Automotive Parts  China high quality Stainless Steel Exhaust Flexible Coupling for Auto Engine Exhaust Automotive Parts
editor by CX 2023-08-10